Usb Otg Integration At System Level - Texas Instruments OMAP5912 Reference Manual

OMAP5912 Description
USB On-The-Go (OTG)
Figure 16.

USB OTG Integration at System Level

MPU/DSP
RAM
Bus IF
(@, R/W, data)
UART
Note: OTG functionality requires a special transceiver external to OMAP5912. The communication between the transceiver
and the controller is done through an I 2 C communication channel.
44 Introduction
The OMAP 5912 OTG module provides a USB device controller, a three-port
USB host controller, and an OTG controller that is capable of providing USB
On-The-Go functionality using the USB device controller and one port o the
USB host controller.
The main features of USB On-The-Go are:
-
USB specification version 1.1 compatible with OTG enhanced features
-
USB host is Open HCI Rev 1.0 compatible.
OMAP5912
Bus IF
Bus IF
(@, R/W,
Bus IF
data)
USB connection (port1)
USB connection (port2)
USB
connection
(port0)
Internal
transceiver
In this case, the USB OTG module port 2 is connected to an external USB OTG
transceiver, port 1 is connected to a USB transceiver, and port 0 is connected
to the integrated USB transceiver.
Interrupt
D+
D−
On board
D+ (3 V)
D− (3 V)
ID
VBUS (5 V)
D+ (3 V)
D− (3 V)
VBUS (5 V)
SPRU748A